Before you call it nonsense, you should actually start giving specific reasons why it wouldn't be an opportunity for Apple and Disney, instead of using examples from the past.
Also, your example shows a technology company acquiring a technology company - whole different scenario.
Apple could benefit from Disney's content and Disney could benefit from Apple's distribution (and devices).
So far, your only point why it wouldn't work is that it hasn't worked for some other companies before. That's what I call nonsense.
That's actually quite reasonable (bolded portions). A tech company buying out its competition is as you mention, typically a bad scenario. In this scenario, Apple's management team doesn't have a lot of experience in this area. They usually integrate smaller companies where the risk is considerably lower. I don't know that Apple's management team would know what to do with it.
Disney has been performing well over the past several years, especially with acquisitions like Marvel which allowed them to put out a number of films based on characters from various comics along with other IP. I haven't kept up with their entire portfolio. You can see their net income here without sifting through a 10k filing. Their market cap is shown around 180b, but any signs of acquisition are likely to put a 20% premium on that. Their net for 2016 was around 15B, and Apple may not want to directly operate some of the legacy infrastructure, such as their parks.
Given those numbers, they would require enormous growth to really justify the purchase. Disney's already quite good at monetizing their own IP, and they have worked with Apple in the past. I'm highly skeptical that they could come up with a business plan that has a high likelihood of justifying the purchase in that price range.